
nokicert
NokiCert makes it possible to install X.509 certificates on Nokia S40 phones. It can install certificates for accessing SSL protected websites as well as for authenticating MIDlet suites to place them in the identified (trusted) third party domain. It uses a Bluetooth connection to the phone to install the certificates. Most S40 phones (assuming they have a certificate database) will work.
NokiCert is written in Java and runs on Windows, Mac OS X and Linux.
See the Wiki for documentation.